Edmond r



Nrrnn STATES PATENT. OFFICE.

EDMOND R. COOK AND STEVARD L COI-ICON, OF SACRAMENTO, CALIFORNIA,ASSIGNORS OF ON E-THIRD TO THOMAS SCOTT, OF SAME PLACE.

FILTER.

SPECIFICATION forming part of Letters Patent No. 626,487, dated June 6,1899.

i Applicationfiled August 12, 1898. Serial No. 688,415. (No model.)

Figure l is a vertical section through the fil@ ter. Fig. 2 is a topview of the device for operating the brushes.

The object of our invention is to provide an automatically-self-cleaningfilter and -means by which the filter is cleaned whenever water is drawnthrough the apparatus.

The apparatus comprises a base A, a dome B, a cylindrical outer casingC, and an inner viilterin,gf-cylinder D, which is made of any suitableporous stone or filtering medium. The base and the annular plate whichextends outwardly from the base of the dome B are fitted with. suitablegaskets, upon which the ends of the outer casing C rest, and by means ofrods S, with suitable nuts, these parts are drawn together, so as to`make tight joints and form a hermetically-sealed outer case. We preferto make this outer casing C of glass, so that the interior of theapparatus can be seen and the operation inspected at any time. Thebase-plate is provided with an inlet-opening E,which may be connectedwith any source of water-supply, such as the connections behind the sinkor other suitable or convenient place, and an outlet E2, at the oppositeside, with a hose-bib or servicecock of any usual or desired form. Thepassage E extends to the center of the base-plate and thence opensupwardly in the center, as shown at E', and the interior of theupwardly-projecting boss is screw-threaded and adapted to receive thehollow cylindrical chamber F, which has curved nozzles G projecting fromopposite sides, so that through these nozzles water is discharged intothe interior of the apparatus.

A hollow shaft H extends upwardly from the part F, and upon this isjournaled the water-Wheel casing I, which in the present `case is shownas consisting of a disk having a downwardly-turned peripheral flange,and within this iiange are the wheel-buckets I, which may be cast orotherwise formed with the disk and flan ge; and these buckets are of anodd number, so that the water passing out through the nozzles G willimpinge upon the buckets and thus rotate the wheel, and by reason of theodd number of buckets there will be no dead-center and the Water Willalways act from at least one of the nozzles to set the wheel inrotation.

Upon the opposite side of the base-plate from the inlet-nozzle E is theoutlet-nozzle E2, and the inner end of this connects With the interiorof the baseplate and within the outer casing C, so ythat water which isadmitted through the inlet E passes up through the part F and outthrough the discharge-nozzles G, setting the wheel into motion and alsoiilling the outer case around the lter D and escaping through thedischarge-passage E2.

The object of the rotary Wheel is to carry the cleaning-brushes J. Thesebrushes are of bristles or anysuitable material fixed into a back J',which is here shown as beveled upon the edges and adapted to slip intoan outer casing or holder J2. This allows the brushes to be removed andreplaced whenever necessary.` The brushes are of a length equal to thelength of a filter D, and the easings J 2 have horizontally-swiveledjoints J2, which are supported upon the verticallyturnable `sleeves K,and these sleeves are turnable about vertical standards K', whichproject upwardly from opposite sides of the wheel-disk, so that thebrushes may be pressed against the outer surface of the filter, and whenthe wheel isrevolved the brushes will be moved rapidly around the filterand its surface be brushed off and cleaned. Itis desirable that thebrushes beheld normally out of contact with the filter and forcedagainst it with any desired degree of pressure Whenever the wheel is setinto rotation. `This is effected by connecting rocker-arms L with therotary sleeves K, and the endsof these rocker-arms are connected byloosely-jointed IOO . Springs N are connected with the rocker-arms L andwith suitable attachments upon the sides of the cylinder M, and thetension of these springs will normally press the plungers in toward thecenter of the cylinder, and thus rotating the sleeves upon the standardswill move the brushes away from the surface of the filter.

Whenever water is admitted through the inlet E, it passes up andis-discharged through the pipes G to set the wheel in rotation, aspreviously described, and also passes up through the hollow shaft H,which has peri forations h made -in it, and these perforations open intothe central and slightly-enlarged portion of the horizontal ycylinderM', so that pressure is at once applied to the plungers M, and they areforced outwardly at the instant when the wheel commences to rotate. TheAplungers thus forced outwardly act through their connecting rods uponthe rocker-arms .L, and rotating the sleeves K will force the brushesinto contact with the filter-surface, and as long as the rotation of thewheel continues they will act to brush the surface of the filter.y Theoutlet E2 being still open, the interior of the chamber between thefilter and the outer casing may be thoroughly washed and cleansed beforethe outlet is closed, and after it has been closed the water will fillthe chamber between the outer casing and the filter whenever the airventO is opened to allow the escape of the air from the upper part of thefilter-chamber. This air-vent may be of any suitable description. Wehave here shown it as a simple connecting-pipe with a cock which isopened at the proper time and allows the air to escape and the chamberto fill up with water.

The air-cock is then closed, and the pressure of water from the inletacts to force the water through the material of the filter to theinterior, and the filtered water is delivered from the interior by meansof an outlet-pipe P, which is here shown as connected with the I ltop ofthe dome B.

In order to conveniently obtain access to the interior of the filter, wehave shown the upper end abutting against the iiat disk which forms thebasevof the dome with a suitable water-tight gasket between the two.

-The lower end of the filter has an annular metal cap D fitted to itwith a similar gasket, and a screw-rod d extends through the center ofthe filter from the bottom cap and-screws into the lower end of adischarge-tube p, which connects with the outlet P of the filter. Thistube has perforations made in it to admit the filtered water from theinterior of the dome,

l soy that it can escape through the outlet P.

The plungers M, which operate to move the brushes, are preferably madein the form of short cylinders of less diameter than the interior of thecylinder M and having flanges Vorbase of the ilter.

at each 'end which fit loosely within the cylinder M', presenting asufficient surface so that the outward pressure of the water will actupon them and force the brushes against the filter; but the tit is looseenough so that any grit or dirt contained in the water will be allowedto escape and will not clog up the cylinders or plungers.

The pressure within the water-mains often varies to a considerableextent, and in lorder to regulate the pressure upon the plungers and theresultant pressure of the brushes upon the filter We have shown anadjustingvalve R, the stem of which is screw-threaded and extends upcentrally through the bottom The valve may be of any suitable form; butwe have here shown it as a conical one and fitting into the opening atthe bottom of the tubular bearing H, upon-which the wheel revolves. Thisvalvestem has a turning-wheel at the lower end by which it may beadvanced or retracted, and the passage of the water into the hollowjournal-shaft `I-I is thus controlled and the pressure upon the pistonsM is regulated to suit the pressure in the mains. By this constructionwe are enabled to provide a ilter which is automatically cleanedwhenever the faucet is opened to draw water for ordinary purposes, andwhen this faucet is closed the pressure within the filter-chamber willforce the water through the porous filtering-cylinder and supplyfiltered water from the discharge-pipe thereof.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

l. A filter comprising an inner hollow filtering-cylinder with adischarge-opening, an outer casing with supply-passages to admit thewater to be filtered between itself and the filter, brushes adapted tocontact with the surface of the filter and having swiveled arms wherebythey adjust themselves to the surface of `the cylinder upon moving aboutthe latter, mechanism by which the brushes are moved around the filterwhenever the discharge-faucet is opened.

2. A filter comprising an exterior case, an interior hollowfiltering-cylinder, supply and discharge Qpenin gs connecting with thespace between the outer case and the inner lterchamber, a hollow chamberconnecting with the supply-passage and having projecting nozzlesdischarging outwardly, a water-wheel centrally journaled so that itsbuckets are in line with the discharge-nozzles whereby the wheel iscaused to rotate when the dischargefaucet is opened, standards extendingupwardly from the periphery of the wheel and brushes carried by saidstandards and adapted to press upon the surface of the filter when thewheel is rotated.

discharge openings connecting with the space IOO IIO

between the two, a central passage having' discharge-nozzles, acentrally-journaled wheel, the buckets ot' which are in line withthedischarge-nozzles whereby the Wheel is rotated when thedischarge-faucet is opened, vertical standards carried upon theperiphery ot` the wheel, brushes adapted to contact with the surface ofthe cylinder and having centrallydisposed swivel-arms whereby thebrushes adjust themselves to the surface of the filter upon moving aboutit.

4. A filter consisting of an outer easing, an inner hollow lter-chamber,passages through which water is admitted to and discharged from thespace between the two, nozzles connectinf,r with the supply-passage, acentrallyjournaled wheel, the buckets of which are in line with thenozzles whereby the wheel is rotatcd when water is drawn through theappwratus, vertical standards extending upwardly from the periphery of thewheel, sleeves turnable loosely upon said standards, brushes nadapted tocontact with the surface of the tilter, centrally-swiveled arms by whichthe brushes are connected with the sleeves and a mechanism whereby thesleeves are turned so as to move the brushes into contact with thefilter while in rotation.

5. In a filter of the character described, a wheel which is rotated whenwater is drawn through the apparatus,vertical standards carried upon thewheel, sleeves turnable about said standards, brushes extending1ongitudinally and adapted to contact with the surface of the filter,swiveled arms by which the brushes are connected with the sleeves, acylinder with plungers movable therein, rockerarlns connected with thebrush carrying sleeves, and connections between said arms and theplungers whereby the pressure of Water upon the plungers acts to rotatethe sleeves -and force the brushes into Contact with the swivelconnections turnable upon the standards whereby vthe brushes arermovedto or from the surface of the ilter, a transverse cylinderhaving thecentral portion connected with the water-supply', plun gers movableoutwardly within the cylinder, rocker-arms connecting with the sleevescarrying the brushes, whereby the pressure of water upon the plungersacts to force the brushes into contact with the iilter, and springsacting to return the plungers and the rocker-arms and move the brushesout of contact with the filter when the Watenpressure is cut off.

7. A filter having an exterior casing and inner filtering-cylinder, acentrally-journaled rotary wheel, brushes carried thereby and adapted topress upon the surface of the tilter while in rotation, a transversecylinder with plungers movable therein, a central passage through whichwater is admitted to the cylinder When the cock is opened whereby ,theplungers are moved outwardly, connections between the plungers and thebrushes whereby the movement ofthe plunger acts to force the brushesinto contact with the filter and a valve controlling the inlet-passageto the cylinder whereby the pressure maybe regulated.

In Witness whereof we have hereunto set our hands.

EDMOND R. COOK.

STEWART) L. COHOON. Witnesses:

S. II. NoURsE, Jnssin C. Bnonrn.-

